| Current Conditions | ||
| Temp |  | 12.8 C |
| RH | | 25 % |
| Wind | | E 0 mph |
| Road | | Open |
|
Menu of Text Products for the Hawaiian Islands and the Tropical Pacific/Atlantic Oceans: |
|
Narrow the Menu List Select Time Limit: 12 hours | 24 hours | 48 hours | 72 hours | No time limit Select Product Type: All | Routine Bulletins/FCSTS | Warnings/Watches/Advisories | HAWN Weather | Tropical | Marine | Aviation | Daily Obs | Special |
|
|
Hawaiian Islands Synoptic Discussion and Guidance 855 FXHW60 PHFO 190144 AFDHFO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 PM HST TUE JUN 18 2013 .SYNOPSIS... TYPICALLY QUIET JUNE WEATHER WILL CONTINUE AS SPRING GIVES WAY TO SUMMER. HIGH PRESSURE TO THE NORTH WILL KEEP TRADE WINDS BLOWING. SHOWERS WILL BE FOCUSED OVER WINDWARD AREAS...AND THESE SHOWERS WILL BE MOST ACTIVE DURING THE NIGHTS AND MORNINGS. THERE MAY ALSO BE SOME AFTERNOON SHOWERS OVER LEEWARD AREAS OF THE BIG ISLAND AND MAUI...BUT RAINFALL WILL BE LIGHT. && .DISCUSSION... SUMMER WILL START THURSDAY EVENING AT 705 PM HST. THIS IS USUALLY THE DRIEST TIME OF YEAR FOR MOST AREAS OF THE MAIN HAWAIIAN ISLANDS. SATELLITE AND RADAR LOOPS AND SURFACE OBSERVATIONS SHOW TYPICALLY QUIET WEATHER THIS EVENING. THERE ARE PATCHY SCATTERED TO BROKEN LOW CLOUDS OVER THE ISLANDS WITH SCATTERED LOW CLOUDS UPSTREAM. RADARS SHOW ONLY ISOLATED LIGHT SHOWERS MOVING OVER THE ISLANDS FROM THE EAST IN THE LOCALLY BREEZY TRADEWIND FLOW. THE COMPUTER MODELS SHOW THE ATMOSPHERE BECOMING DRIER AND THE LOW-LEVEL MOISTURE GETTING SHALLOWER OVER THE NEXT 24 HOURS...SO RAINFALL IS LIKELY TO BE QUITE SPARSE TOMORROW THROUGH FRIDAY. WITH TRADE WINDS CONTINUING...WHAT RAINFALL WE DO GET WILL BE CONCENTRATED OVER WINDWARD AREAS. CLIMATOLOGY SHOWS A SUMMERTIME PEAK IN RAINFALL OVER SOUTH KONA...BUT IT LOOKS AS IF THE LEEWARD SIDE OF THE BIG ISLAND WILL REMAIN QUITE DRY. COMPUTER MODELS CONTINUE TO SHOW A BIG LOW DEVELOPING UP NEAR THE ALEUTIANS OVER THE NEXT COUPLE OF DAYS AND SHOW THE SUBTROPICAL RIDGE WEAKENING AND SHIFTING SOUTH. THAT SHOULD WEAKEN THE PRESSURE GRADIENT OVER THE ISLANDS AND CAUSE TRADE-WIND SPEEDS TO DROP OFF A BIT WEDNESDAY NIGHT THROUGH THURSDAY NIGHT. THE RIDGE WILL RE-BUILD BY THE WEEKEND AND TRADES WILL LIKELY BECOME LOCALLY BREEZY AGAIN. && .AVIATION... THERE SHOULD BE LITTLE CHANGE IN AVIATION WEATHER AROUND THE MAIN HAWAIIAN ISLANDS THROUGH AT LEAST THE NEXT 24 HOURS. CONDITIONS WILL REMAIN MOSTLY VFR EXCEPT FOR ISOLATED MVFR CEILINGS OVER WINDWARD AND MOUNTAIN AREAS. && .MARINE... A SMALL CRAFT ADVISORY...SCA...IS NOW UP THROUGH EARLY WEDNESDAY EVENING FOR LOCALLY STRONG TRADE WINDS AND ROUGH SEAS IN THE WINDIER AREAS AROUND MAUI AND THE BIG ISLAND. WINDS WILL SUBSIDE SLIGHTLY WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...PROBABLY ENOUGH TO ALLOW US TO DROP THE SCA FOR A DAY OR TWO. A SCA IS LIKELY TO GO BACK UP AGAIN FRIDAY. SURF WILL BE GENERALLY SMALL EXCEPT FOR MODERATE SURF ALONG EAST SHORES DUE TO THE TRADE WINDS. A SMALL SOUTHEAST SWELL MAY AFFECT THE BIG ISLAND STARTING SUNDAY...BUT THE BIG ISLAND WILL LIKELY BLOCK MOST OF THE SWELL FROM REACHING THE REST OF THE ISLANDS. && .HFO WATCHES/WARNINGS/ADVISORIES... SMALL CRAFT ADVISORY UNTIL 600 PM HST WEDNESDAY FOR MAALAEA BAY... THE WATERS SOUTH OF THE BIG ISLAND...AND THE PAILOLO AND ALENUIHAHA CHANNELS. && $$ DONALDSON Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
|